Subject: Progress on NZ gear box
From: "rotaryeng@earthlink.net" <rotaryeng@earthlink.net>
Date: 2/16/2015, 4:14 AM
To: AA-1-Me


  Hi Paul,
        A couple of pics of the gearbox bits so far. I am going to
see if the gearbox can be made so as to be able to change the ratio to 2.85
or 3.17 relatively easily.
                Cheers Chris. in NZ


Looking good Chris. Good idea. Since the stock red line on the Mazda RX8 is 9000 RPM the
3.12 makes the most sense. At 1700 prop RPM that gives 8400 Engine RPM
which is still below the 300 HP possible with a Mazda p-port at 9000 RPM. My guess
is an easy 280 HP. That puts the Mazda rotary 100 pounds lighter than any
piston aircraft engine of the same power and about the same weight as a turbo
prop engine with half the fuel burn. With aluminum end housings it would be 50 pounds
lighter still. Of course a turbo compound version would destroy the rest of the
light aircraft engine industry and give more power at altitude than a turbo prop.

I wonder when they are going to wake up :)

Paul Lamar

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